diff options
Diffstat (limited to 'src/common/android/breakpad_getcontext.S')
| -rw-r--r-- | src/common/android/breakpad_getcontext.S | 81 |
1 files changed, 81 insertions, 0 deletions
diff --git a/src/common/android/breakpad_getcontext.S b/src/common/android/breakpad_getcontext.S index 86ef8daf..79fe88df 100644 --- a/src/common/android/breakpad_getcontext.S +++ b/src/common/android/breakpad_getcontext.S @@ -305,6 +305,87 @@ NESTED (breakpad_getcontext, FRAME_SIZE, ra) END (breakpad_getcontext) +#elif defined(__x86_64__) +/* The x64 implementation of breakpad_getcontext was derived in part + from the implementation of libunwind which requires the following + notice. */ +/* libunwind - a platform-independent unwind library + Copyright (C) 2008 Google, Inc + Contributed by Paul Pluzhnikov <ppluzhnikov@google.com> + Copyright (C) 2010 Konstantin Belousov <kib@freebsd.org> + +This file is part of libunwind. + +Permission is hereby granted, free of charge, to any person obtaining +a copy of this software and associated documentation files (the +"Software"), to deal in the Software without restriction, including +without limitation the rights to use, copy, modify, merge, publish, +distribute, sublicense, and/or sell copies of the Software, and to +permit persons to whom the Software is furnished to do so, subject to +the following conditions: + +The above copyright notice and this permission notice shall be +included in all copies or substantial portions of the Software. + +THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, +EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF +MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND +NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE +LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION +OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION +WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */ + + .text + .global breakpad_getcontext + .hidden breakpad_getcontext + .align 4 + .type breakpad_getcontext, @function + +breakpad_getcontext: + .cfi_startproc + + /* Callee saved: RBX, RBP, R12-R15 */ + movq %r12, MCONTEXT_GREGS_R12(%rdi) + movq %r13, MCONTEXT_GREGS_R13(%rdi) + movq %r14, MCONTEXT_GREGS_R14(%rdi) + movq %r15, MCONTEXT_GREGS_R15(%rdi) + movq %rbp, MCONTEXT_GREGS_RBP(%rdi) + movq %rbx, MCONTEXT_GREGS_RBX(%rdi) + + /* Save argument registers (not strictly needed, but setcontext + restores them, so don't restore garbage). */ + movq %r8, MCONTEXT_GREGS_R8(%rdi) + movq %r9, MCONTEXT_GREGS_R9(%rdi) + movq %rdi, MCONTEXT_GREGS_RDI(%rdi) + movq %rsi, MCONTEXT_GREGS_RSI(%rdi) + movq %rdx, MCONTEXT_GREGS_RDX(%rdi) + movq %rax, MCONTEXT_GREGS_RAX(%rdi) + movq %rcx, MCONTEXT_GREGS_RCX(%rdi) + + /* Save fp state (not needed, except for setcontext not + restoring garbage). */ + leaq MCONTEXT_FPREGS_MEM(%rdi),%r8 + movq %r8, MCONTEXT_FPREGS_PTR(%rdi) + fnstenv (%r8) + stmxcsr FPREGS_OFFSET_MXCSR(%r8) + + leaq 8(%rsp), %rax /* exclude this call. */ + movq %rax, MCONTEXT_GREGS_RSP(%rdi) + + movq 0(%rsp), %rax + movq %rax, MCONTEXT_GREGS_RIP(%rdi) + + /* Save signal mask: sigprocmask(SIGBLOCK, NULL, &uc->uc_sigmask) */ + leaq UCONTEXT_SIGMASK_OFFSET(%rdi), %rdx // arg3 + xorq %rsi, %rsi // arg2 NULL + xorq %rdi, %rdi // arg1 SIGBLOCK == 0 + call sigprocmask@PLT + + /* Always return 0 for success, even if sigprocmask failed. */ + xorl %eax, %eax + ret + .cfi_endproc + .size breakpad_getcontext, . - breakpad_getcontext #else #error "This file has not been ported for your CPU!" |